Xkvhsaooiav i ihajivii ss lutho



(No Model O. H. WIOKERSHAM.

ELEOTRIO HIGH AND LOW WATER DETEOTOR FOR STEAM BOILERS.

No. 309,425. Patented Dec. 16, 1884.

zgyz

Z Q o k E WITNESSES: 5

ATTORNEYS.

- euit.

CII ARLES HARVEY \VICKERSI IAN,

ELECTRlC HIGH AND LOW WATER Application h'led April 23 1.

a": of Letters Patent DEIECTO R FOR STEAt l-BOlLERS.

(No model) To all whom it may concern.-

Be it known that I, OnirnLns H. Wrcknn- SHAH, oi' Pottstown, in thecounty ot Montgomery and State of Pennsylvania, have invented a new andImproved Electric High and Low \Vater Detector for Steam-Boilers, ofwhich the following is ai'ull, clear, and exact description.

My invention consists of a galvanized iron stand-pipe, suitablyconnected with the boiler for circulation of water and steam, andcontaining a float having a vertical stem of alittle greater length thanthe range between high and low water, and carrying elcctricconductors,which are brought into contact with conductors located inside of thetube at suitable points for completing the electric circuit, in which Iinclude a multiplex aununciator, when several boilers are employed, bywhich all the boilers may be connected in onecir- The invention includesimprovements in the construction of the conducting apparatus and theguide for the stem of the tloat, all as hereinafter t'ull y describedand specil icall y claimed.

Keference is to be had to the accompanying drawings, forn'iingpart ofthis speci h cation, in which similar letters of reference i ndicatccorresponding parts in all the figures Figurel is a partially-brokensectional ele vation of the stand-pipe and the guide for the stem of theiloat, together with a side eleva tion of the battery anda frontelevation of the annunciator. Fig. 2 is a cross-section oi. thestand-pipe on the broken line r, 'liig.

1. Fig. 3 is a detail of the binding-posts for making the electricalconnections through the l stand-pipe as I propose to arrange them in 1practice.

I connect a galvanizml-iron stand-pipe, a, of about five inches indiameter and suitable length with the boiler (not shown) by pipes 12 andc, for the circulation of water and steam. 1

- and arrange a suitable float, (Z, in the tube, 5

with a stem, 0, a little longer than the range 5 between high and lowwater, which extends upward through a guide, f, and has a copper disk,9, near the float, for making the connection to signal high water, andanother disk, 71, near the upper end, to make the connection for lowwater, said disks being adjust l able along the stem with setscrews 2',to set them according to the desired limits of the range of thewater-level.

To make the connections for completing the electric circuit, I arrangethe bii'iding-postsj for the wires [0 in opposite sides of thestandpipe, and having copper plates 7;, attachediir side oi the tube forcontact with the disk 9, and suitably located for completing the circuitwhen the high level is reached, and I also arrange similar bindingposts,j, and copper plates 2 higher up in the tube, for contact of the disk/1, to complete the circuit for low water. The disksg and It are littleconvex on the sides that make the connections with the copper plates7th, and said plates are slitted into separate iingers in the l ea ringparts, so that said fingers will spring by the pressure of the water orweight of the iloat, and thus will make several points of contact toeach plate to insure the proper electric contact, which might soinetinusfail with only one or two points of contact in case any scale ofnon-conducting material should happen to get between the plates anddisk, and the yielding of the fingers all'ords more certainty of conncction with both plates in case the iloat should happen to illcline alittle more to one side than the other by the action of the water orimperfect balance, which would, in the case of non-yielding plates,prevent contact with one of them at 1011.". As the float will besupported about hall its height above the surface of the water, it willbe seen that the connecting-plates are located a considerable distanceabove the water, where they will be much less liable to be fouled withdeposits oi the water or floating objects in it.

Any suitable term of alarm-signal may be connected with the wires Z 'lltwhen only a single boiler is to be connected in the circuit; but formore than one I propose to employ a multiplex annijinciator, n, such asis used in hotcl-oiiices for connecting with the different rooms, sothat each boiler of a series may be represented by a special signaldevice of the annunciator. I bevel the wall of the guidehole through theguidc-arinfior the stem c of the iloat to form a narrow edge, p, whichwill avoid the binding of the stem therein when the float shifts fromside to side of the tube, and thus will allow the stem to rise and fallthrough the guide with loss friction than othervisc. The galvanizedstmnhpipe will not rust, zrsnn ordinary pipe will, and will not break,like aglnss pipe.

For the binding-pests to nnthe the electrical connections through thestendpipe I progose in practice to employ copper bolts, having a collar,2), outside and e check-nut, q, inside, withbinding-screwss and if,endholesor nicks u for the wires, vshieh I p opose to insulate with itrubber tube, 0, and rubber Washer 10, respectively, fitted through theholes of the stand-pipe and against the Sines between the colle' andnut, making a simple device for the purpose.

Having thus des u'ibed my invention, 1. Cizti in i as new and desire tosecure by Lotte Patent- 1. The coinbinetion er the slittedconductingpletcs 7 7.2 of the electric eirenit, having elastic iingers,with the convex disks of the stem of the tlont, substantially described.

2. Ti l eoinbinution of :2 multiplex annun eintor with in electric highand low water 21in :in-eignnl ;\p; n1'ntiis including two or more boilein the circuit, having etarid-pipe a, float (3, copper dislis 7i, andthe conductingplntes 7th, substantially as described.

3. in an electric high end lowwuter detector, the combination, with theshunt-pipe (t, provided with conducting-flutes connected with anwarm-float, d, and stem a, hea ing; connecting'pletes, ol' the guidef,for the floatsteni, having the bevel guide-ed cs j) in the hole for thestem, substantially as described.

CHARLES llilill'lll' WlCKERSilAlI. iv'itneecsz .I'onn EARL iv, .7.dfi'oniciisirui.

